计算机科学 ›› 2019, Vol. 46 ›› Issue (12): 298-305.doi: 10.11896/jsjkx.190900003
曾凡智, 周燕, 余家豪, 罗粤, 邱腾达, 钱杰昌
ZENG Fan-zhi, ZHOU Yan, YU Jia-hao, LUO Yue, QIU Teng-da, QIAN Jie-chang
摘要： 针对企业产品制造过程中海量的计算机辅助设计(Computer Aided Design,CAD)模型的高效检索难题,文中研究了一种基于二维CAD模型内容特征的检索算法,构建了一个可用于CAD的DXF格式源文件模型库的检索系统原型。首先,通过对二维CAD模型的DXF文件结构进行分析,来研究模型中的图元规律并进行形状重构;其次,依据图元特点,提出了基于统计直方图、二维形状分布和傅里叶变换共3类内容特征的提取方法;最后,设计了基于无监督学习的多特征融合框架及相似度计算方法,从而提取出了模型的融合特征描述子并实现了二维CAD模型检索。实验结果表明,文中提取的融合特征相较于单一特征包含了更加丰富的内容特征且具有高效的鉴别力。该系统可以直接应用于产品个性化定制、设计重用等方面,有助于企业进一步提升智能制造能力。
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